staging: unisys: visorinput: correct code comments per kernel conventions

Multi-line comments were modified to conform to kernel conventions:

    /*
     * multi-line
     * comments
     */

doc-test /** */ for some comments was removed.

Signed-off-by: Tim Sell <Timothy.Sell@unisys.com>
Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>